NAME

aio_return - get return status of asynchronous I/O operation

SYNOPSIS

#include<aio.h>ssize_taio_return(structaiocb*aiocbp);
Link with -lrt.

DESCRIPTION

The aio_return() function returns the final return status for the
asynchronous I/O request with control block pointed to by aiocbp. (See
aio(7) for a description of the aiocb structure.)
This function should be called only once for any given request, after
aio_error(3) returns something other than EINPROGRESS.

RETURNVALUE

If the asynchronous I/O operation has completed, this function returns
the value that would have been returned in case of a synchronous
read(2), write(2), fsync(2) or fdatasync(2), call.
If the asynchronous I/O operation has not yet completed, the return
value and effect of aio_return() are undefined.

ERRORS

EINVALaiocbp does not point at a control block for an asynchronous I/O
request of which the return status has not been retrieved yet.